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Method for measuring viscoelasticity of gel particles

A gel particle and viscoelasticity technology, applied in the field of gel particle viscoelasticity evaluation, can solve the problems of long test time, decreased elasticity and strength, unable to truly reflect the gel particle viscoelasticity, etc., and achieve rich evaluation methods and test time. Short, the effect of improving test accuracy and test efficiency

Active Publication Date: 2015-12-23
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

What this method actually measures is the storage modulus of the bulk gel, which reflects the elasticity and strength of the bulk gel; and after the gel particles are prepared from the bulk gel, the structure between the particles is not as strong as the bulk gel, and its Elasticity and strength will decrease, so this method cannot truly reflect the viscoelasticity of gel particles
Kang Wanli and others published "The Interaction of Non-ionic Surfactant TritonX-100 and Pre-crosslinked Gel Particles" in "Polymer Materials Science and Engineering" 2013 No. 2. In this paper, the cone and plate of the MCR301 rheometer were used The measurement system (the diameter of the cone and plate is 49.959mm, the spacing is 0.047mm, and the cone angle is 1°) measures the viscoelasticity of the expanded gel particles. Although this method ensures that the measured data is the viscoelasticity of the gel particles, However, during the measurement process, there are problems such as difficult adjustment of interlaminar spacing and long test time.
There is still a lack of a rapid and accurate method for determining the viscoelasticity of gel particles

Method used

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  • Method for measuring viscoelasticity of gel particles

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Embodiment 1

[0019] Gel particle 1# is produced by Daqing New Wantong Chemical Co., Ltd., and the particle size is 100-200 mesh; Magnetic stirrer (Changzhou Guohua Electric Co., Ltd.); Rheometer (MCR301 rheometer of AntonPaar, Austria), measuring The system is PP43 / GL-SN11457. Gel particle 1# is anionic gel particle, and the concentration of cross-linking agent is 0.21%.

[0020] The method for measuring the viscoelasticity of gel particles includes the following steps. The first step is to prepare a dispersion system of gel particles to make them fully swell. In a beaker with a volume of 250mL, add 100mL of simulated formation water, put a magnetic rotor, put the beaker on the workbench of the magnetic stirrer, turn on the switch of the magnetic stirrer to make the magnetic rotor start to rotate, adjust the magnetic stirrer Turn the knob into the beaker to form a swirl of simulated formation water. Weigh gel particles 1# with a mass of 1 g, slowly add the gel particles to the vortex wal...

Embodiment 2

[0024] Gel particle 2# is produced by Daqing New Wantong Chemical Co., Ltd., and the particle size is 100-200 mesh; Magnetic stirrer (Changzhou Guohua Electric Co., Ltd.); Rheometer (MCR301 rheometer of AntonPaar, Austria), measuring The system is PP43 / GL-SN11457. Gel particle 2# is anionic gel particle, and the cross-linking agent concentration is 0.03%.

[0025] The method for measuring the viscoelasticity of gel particles includes the following steps. The first step is to prepare a dispersion system of gel particles to make them fully swell. In a beaker with a volume of 250mL, add 100mL of simulated formation water, put a magnetic rotor, put the beaker on the workbench of the magnetic stirrer, turn on the switch of the magnetic stirrer to make the magnetic rotor start to rotate, adjust the magnetic stirrer Turn the knob into the beaker to form a swirl of simulated formation water. Weigh gel particles 2# with a mass of 1 g, slowly add the gel particles to the vortex wall f...

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Abstract

The invention provides a method for measuring viscoelasticity of gel particles. The method includes the steps of firstly, preparing a gel particle dispersion system, and making the gel particle dispersion system sufficiently swell; secondly, conducting a creep recovery test on gel particles; thirdly, processing experimental data, and evaluating viscoelasticity of gel particles. The method is put forward on the basis that gel particles have a certain creep property, the creep recovery test of gel particles is conducted through a rheometer, and the viscosity response and the elasticity response of gel particles can be separated. By means of the put-forward rheology method for measuring viscoelasticity of gel particles through the creep recovery test, the true viscoelasticity of gel particles can be measured, the test time is short, measurement accuracy and measurement efficiency are improved, and evaluation methods of gel particles are abundant.

Description

technical field [0001] The invention belongs to the technical field of viscoelasticity evaluation of gel particles, in particular to a method for measuring the viscoelasticity of gel particles. Background technique [0002] Most of the oilfields in my country have entered the middle and late stage of development, and the injected water often only enters along the fractures or large pores, causing the production wells to break through water prematurely, the water content increases rapidly, and even more serious, the oil wells will be flooded; on the other hand , because the mobility of water is much larger than that of crude oil, the swept volume of injected water is small, and the large amount of remaining oil in the matrix system is produced to a small degree, and the oil displacement efficiency is low. If the water is injected continuously, it will cause an invalid circulation of the injected water and increase the production cost. [0003] In order to improve oil recovery...

Claims

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Application Information

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IPC IPC(8): G01N11/00
Inventor 刘述忍康万利赵健朱礼斌王超何洋陈金峰刘杨徐凤兰邵振鹏
Owner BC P INC CHINA NAT PETROLEUM CORP
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